A transmission assembly for a string trimmer is disclosed. The transmission assembly comprises a liner that includes a sleeve. The sleeve includes an inner surface that defines a passageway for a rotatable core, and the sleeve further includes an outer surface. The liner further includes a plurality of legs that project from the outer surface, and a retainer projection disposed at a position axially adjacent to the plurality of legs. The transmission assembly further comprises a retainer that is held to the liner by the retainer projection. The retainer is configured to axially and radially restrain the liner relative to an outer down-tube.
